bluetooth: Web Bluetooth can filter by empty device names, doesn't leak MACs.

third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module blink.mojom;
 
 import "device/bluetooth/public/interfaces/bluetooth_uuid.mojom";
 
 // Errors that can occur during Web Bluetooth execution, which are transformed
 // to a DOMException in Source/modules/bluetooth/BluetoothError.cpp.
@@ skipping 74 matching lines @@
 
 // Indicates if the function will return a single or multiple
 // GATT objects.
 enum WebBluetoothGATTQueryQuantity {
   SINGLE,
   MULTIPLE
 };
 
 struct WebBluetoothDevice {
   string id;
-  string name;
+  string? name;
   array<string> uuids;
 };
 
 struct WebBluetoothRemoteGATTService {
   string instance_id;
   string uuid;
 };
 
 struct WebBluetoothRemoteGATTCharacteristic {
   string instance_id;
@@ skipping 73 matching lines @@
 };
 
 // Classes should implement this interface and pass an associated pointer
 // bound to them to the WebBluetoothService by using SetClient. Classes
 // that do this will be notified of device events e.g. device disconnection.
 interface WebBluetoothServiceClient {
   RemoteCharacteristicValueChanged(string characteristic_instance_id,
                                    array<uint8> value);
   GattServerDisconnected(string device_id);
 };